Hydraulic auxiliary drive axle and vehicle

Abstract

The present invention relates to a hydraulically assisted drive axle and a vehicle, comprising a main reducer and a hydraulic drive assembly. The present invention effectively enhances the driving ability of the vehicle during startup or under adverse working conditions by providing the hydraulic drive assembly, thereby effectively improving the overall performance and operational reliability of the vehicle. By providing the main reducer, while ensuring efficient power output and timely driving ability of the axle, the axle has a compact and simple structure compared to traditional all-wheel drive, and the number of parts is significantly reduced, thereby effectively reducing the manufacturing cost of vehicles with all-wheel drive function requirements. By providing an actuator to achieve power disconnection or connection, the timely driving function of the axle is guaranteed, and no additional power source is required for driving when auxiliary drive is not required, thereby effectively improving the fuel economy of the vehicle while ensuring the driving performance of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of heavy-duty commercial vehicle drive axles, and in particular to a hydraulically assisted drive axle and a vehicle. Background Art

[0002] Currently, most conventional heavy-duty commercial vehicles use a rear-axle drive structure. However, this structure often encounters problems such as insufficient driving force during the startup phase or when trying to escape from a difficult situation, resulting in damage to the vehicle or equipment or failure to escape from a difficult situation.

[0003] To solve this problem, a mechanical all-wheel drive structure is often used. Although the mechanical all-wheel drive structure can improve the driving performance of the vehicle, it cannot achieve timely driving, which is not conducive to the effective improvement of the vehicle's fuel economy. At the same time, the mechanical all-wheel drive structure places higher requirements on the performance of the vehicle's engine and transmission, which in turn leads to high manufacturing costs of vehicles using the mechanical all-wheel drive structure.

[0004] Therefore, there is an urgent need to design an auxiliary drive axle and vehicle with timely drive characteristics, which can effectively improve the manufacturing cost and fuel economy of the vehicle while ensuring the vehicle driving performance. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the existing technology and thus provide a hydraulically assisted drive axle and vehicle, which adopts a hydraulically assisted drive structure and a power disconnect device to realize the timely drive function of the axle, thereby solving the problems of relatively weak driving performance of existing conventional heavy-duty commercial vehicles and high fuel consumption and high cost of mechanical all-wheel drive vehicles.

[0006] The present invention is achieved by adopting the following technical solutions:

[0007] A hydraulic auxiliary drive axle, comprising a main reducer and a hydraulic drive assembly;

[0008] The main reducer includes a driving gear shaft spline-connected to the output end of the hydraulic drive assembly, a driven gear meshing with the driving gear shaft, a driven gear meshing sleeve arranged at the center of the driven gear, an actuator connected to the driven gear meshing sleeve, a driving bevel gear, a driving bevel gear meshing sleeve arranged on the driving bevel gear, and a driven bevel gear meshing with the driving bevel gear;

[0009] One end of the passive gear meshing sleeve is connected to the actuator, and the other end of the passive gear meshing sleeve is provided with a first end face tooth structure; one end of the active bevel gear meshing sleeve is connected to the active bevel gear, and the other end of the active bevel gear meshing sleeve is provided with a second end face tooth structure; the first end face tooth structure of the passive gear meshing sleeve is disengaged or engaged with the second end face tooth structure of the active bevel gear meshing sleeve under the action of the actuator.

[0010] Preferably, the hydraulic drive assembly includes a hydraulic motor; the output end of the hydraulic motor is spline-connected to the driving bevel gear.

[0011] Preferably, the main reducer further includes a reducer housing, a bearing seat, a reducer case and a case cover:

[0012] The bearing seat is arranged inside the reducer housing, and the bearing seat is connected to the reducer housing through a first threaded fastener; the reducer housing is on the side away from the reducer housing, and is connected to the housing cover through a second threaded fastener.

[0013] Preferably, the passive gear meshing sleeve is provided with a mounting plane near the box cover, a cover plate is provided below the mounting plane of the passive gear meshing sleeve, a base is provided above the mounting plane of the passive gear meshing sleeve, and the cover plate and the base are connected by fastening screws; a guide pin is provided through the cover plate and the base.

[0014] Preferably, the actuator includes a cylinder, a guide rod, and a return spring; the output end of the cylinder is connected to the guide rod, the return spring is arranged between the guide rod and the reducer housing, the bottom end of the guide rod is connected to the passive gear meshing sleeve through a cover plate and a base, and the first end face tooth structure of the passive gear meshing sleeve and the second end face tooth structure of the active bevel gear meshing sleeve are detachably connected.

[0015] Preferably, the hydraulic drive assembly is fixed on the outer surface of the box cover near the center of the driving gear shaft, and the actuator is fixed on the outer surface of the box cover near the center of the driven gear.

[0016] Preferably, the number of the guide pins is not less than 2, one end of the guide pin is interference-fitted into the mounting holes of the cover plate and the base, and the other end is arranged in the guide hole of the box cover.

[0017] Preferably, it further comprises an axle housing assembly, wherein the passive bevel gear is arranged in the axle housing assembly, and the passive bevel gear is connected to the axle wheel side through a half shaft.

[0018] Preferably, the axle housing assembly is any one of a steering drive axle housing, a drive rear axle housing, and a drive middle axle housing.

[0019] A vehicle comprises any one of the hydraulically assisted drive axles described above.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] 1. Strong driving ability: By setting up hydraulic drive components, the driving ability of the vehicle is effectively enhanced during startup or under harsh working conditions, effectively improving the overall performance and operating reliability of the vehicle;

[0022] 2. Low cost: By installing a final reducer, while ensuring efficient axle power output and timely driving capabilities, the structure is compact and simple compared to traditional all-wheel drive, and the number of parts is significantly reduced, thereby effectively reducing the manufacturing cost of vehicles requiring all-wheel drive functions;

[0023] 3. Low energy consumption: By setting an actuator to disconnect or connect the power, the timely driving function of the axle is guaranteed. When auxiliary drive is not required, no additional power source is required to drive it. Therefore, while ensuring the vehicle's driving performance, the vehicle's fuel economy is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0026] Figure 2 This is a schematic structural diagram of a main reducer in an embodiment of the present invention;

[0027] Figure 3 Schematic diagram of the structure of the power disconnect device of the main reducer in an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the installation structure of the active bevel gear in an embodiment of the present invention;

[0029] Figure 5 Schematic diagram of the power transmission structure of the non-auxiliary drive working condition in an embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the power transmission structure with auxiliary drive working condition in an embodiment of the present invention.

[0031] Description of Reference Numerals

[0032] 1. Axle housing assembly; 2. Main reducer; 3. Hydraulic drive assembly; 11. Driving gear shaft; 12. Passive gear; 13. Driving bevel gear; 14. Passive bevel gear; 15. Reducer housing; 16. Driving bevel gear engagement sleeve; 17. Locking nut; 18. Threaded fastener 1; 19. Bearing seat; 20. Reducer housing; 21. Threaded fastener 2; 22. Housing cover; 23. Passive gear engagement sleeve; 24. Cover plate; 25. Base; 26. Guide pin; 27. Actuator; 28. Fastening screw; 29. ​​Driving bevel gear bearing. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example:

[0035] like Figures 1-6 As shown, the present invention provides a hydraulic auxiliary drive axle and vehicle, which are characterized by including an axle housing assembly 1, a main reducer 2, and a hydraulic drive component 3:

[0036] In this embodiment, if Figure 2-Figure 4 As shown, the main reducer 2 includes a driving gear shaft 11, a driven gear 12, a driving bevel gear 13, and a driven bevel gear 14; the driving gear shaft 11 is connected to the hydraulic oil drive assembly 3 through a spline, and is meshed with the driven gear 12 through helical teeth; the center position of the driven gear 12 is connected to a driven gear meshing sleeve 23 through a spline; one end of the driven gear meshing sleeve 23 is connected to the actuator 27 through a cover plate 24 and a base 25, and the other end is provided with a first end face tooth structure, and realizes movement in the vertical direction under the action of the actuator 27; the driving bevel gear 13 is provided with a driving bevel gear meshing sleeve 16 at the end away from the driven bevel gear 14; one end of the driving bevel gear meshing sleeve 16 is in contact with the driving bevel gear bearing 29, and the other end is provided with a second end face tooth structure and is fixed by a locking nut 17;

[0037] In this embodiment, the hydraulic drive assembly 3 may be a hydraulic motor, which provides power to the driving gear shaft 11, and the output end of the hydraulic motor is connected to the driving gear shaft 11 via a spline;

[0038] In this embodiment, if Figure 2 As shown, the main reducer 2 includes a reducer housing 15, a bearing seat 19, a reducer case 20 and a case cover 22: the bearing seat 19 is arranged inside the reducer case 20 and is connected to the reducer housing 15 by a threaded fastener 18; the reducer case 20 is connected and fixed with a case cover 22 on the side away from the reducer housing 15 by a threaded fastener 21;

[0039] In this embodiment, if Figure 3As shown, the passive gear meshing sleeve 23 is provided with a mounting plane near the box cover 22, a cover plate 24 is provided below the mounting plane, and a base 25 is provided above the mounting plane. The cover plate 24 and the base 25 are connected by fastening screws 28; guide pins 26 are provided through the cover plate 24 and the base 25. The number of the guide pins 26 is not less than 2, one end of which is inserted into the mounting hole of the cover plate 24 and the base 25 by interference, and the other end is provided in the guide hole of the box cover 22;

[0040] In this embodiment, the actuator 27 includes a cylinder, a guide rod, and a return spring; the output end of the cylinder is connected to the guide rod, the return spring is arranged between the guide rod and the reducer housing 15, and the bottom end of the guide rod is connected to the passive gear meshing sleeve 23 through the cover plate 24 and the base 25; the cylinder provides power to the guide rod, driving the guide rod to compress the return spring, and causing the cover plate 24 and the base 25 to move downward along the guide pin 26, so that the first end face tooth structure of the passive gear meshing sleeve 23 is matched with the second end face tooth structure of the active bevel gear meshing sleeve 16; the cylinder cuts off the power, and the return spring returns to its original position, so that the first end face tooth structure of the passive gear meshing sleeve 23 is disengaged from the second end face tooth structure of the active bevel gear meshing sleeve 16;

[0041] In this embodiment, if Figure 3 As shown, a hydraulic drive assembly 3 is fixedly provided on the outer surface of the box cover 22 near the center of the driving gear shaft 11, and an actuator 27 is fixedly provided near the center of the driven gear 12;

[0042] In this embodiment, the passive bevel gear 14 is disposed in the axle housing assembly 1 and is connected to the wheel side of the axle via a half shaft to drive the vehicle forward or backward;

[0043] In this embodiment, the axle housing assembly 1 can be selected as one of a steering drive axle housing, a drive rear axle housing or a drive middle axle housing;

[0044] The principle of the present invention to realize the timely driving function is as follows: Figure 5 、 6 As shown, when auxiliary drive is required, the output shaft of the hydraulic drive assembly 3 is connected to the driving gear shaft 11 through a spline, the driving gear shaft 11 and the driven gear 12 are meshed with each other for transmission, and the driven gear meshing sleeve 23 arranged at the center position of the driven gear 12 moves in the reverse direction in the vertical direction under the push of the actuator 27, and the first end face tooth structure of the driven gear meshing sleeve 23 away from the actuator 27 on the side of the driving bevel gear meshing sleeve 16 provided on the driving bevel gear 13 cooperates with the second end face tooth structure of the driving bevel gear meshing sleeve 16 provided on the driving bevel gear 13, thereby transmitting the driving force generated by the hydraulic drive assembly 3 to the driving bevel gear 13, the driving bevel gear 13 meshes with the driven bevel gear 14, and the driven bevel gear 14 transmits the power to the axle wheel side, thereby realizing auxiliary drive of the axle;

[0045] When auxiliary drive is not required, the first end face tooth structure on the passive gear engagement sleeve 23 and the second end face tooth structure on the active bevel gear engagement sleeve 16 are disengaged under the action of the actuator 27, thereby interrupting the driving force.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and scope of the appended claims be encompassed. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0047] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulically assisted drive axle, characterized in that: It includes a main reducer (2) and a hydraulic drive assembly (3); The main reducer (2) comprises a driving gear shaft (11) spline-connected to the output end of the hydraulic drive assembly (3), a driven gear (12) meshingly connected to the driving gear shaft (11), a driven gear meshing sleeve (23) arranged at the center of the driven gear (12), an actuator (27) connected to the driven gear meshing sleeve (23), a driving bevel gear (13), a driving bevel gear meshing sleeve (16) arranged on the driving bevel gear (13), and a driven bevel gear (14) meshingly connected to the driving bevel gear (13); One end of the passive gear meshing sleeve (23) is connected to the actuator (27), and the other end of the passive gear meshing sleeve (23) is provided with a first end face tooth structure; one end of the active bevel gear meshing sleeve (16) is connected to the active bevel gear (13), and the other end of the active bevel gear meshing sleeve (16) is provided with a second end face tooth structure; the first end face tooth structure of the passive gear meshing sleeve (23) is disengaged from or engaged with the second end face tooth structure of the active bevel gear meshing sleeve (16) under the action of the actuator (27); The main reducer (2) further comprises a reducer housing (15), a bearing seat (19), a reducer housing (20) and a housing cover (22): The bearing seat (19) is arranged inside the reducer housing (20), and the bearing seat (19) is connected to the reducer housing (15) through a first threaded fastener (18); the reducer housing (20) is on a side away from the reducer housing (15), and is connected to the housing cover (22) through a second threaded fastener (21); The passive gear meshing sleeve (23) is provided with a mounting plane near the box cover (22), a cover plate (24) is provided below the mounting plane of the passive gear meshing sleeve (23), a base (25) is provided above the mounting plane of the passive gear meshing sleeve (23), and the cover plate (24) and the base (25) are connected by fastening screws (28); a guide pin (26) is provided through the cover plate (24) and the base (25); the number of the guide pins (26) is not less than 2; The actuator (27) includes a cylinder, a guide rod, and a return spring; the output end of the cylinder is connected to the guide rod, the return spring is arranged between the guide rod and the reducer housing (15), the bottom end of the guide rod is connected to the passive gear meshing sleeve (23) through a cover plate (24) and a base (25), and the first end face tooth structure of the passive gear meshing sleeve (23) and the second end face tooth structure of the active bevel gear meshing sleeve (16) are detachably connected.

2. The hydraulically assisted drive axle according to claim 1, characterized in that: The hydraulic drive assembly (3) comprises a hydraulic motor; the output end of the hydraulic motor is spline-connected to the driving bevel gear (13).

3. The hydraulically assisted drive axle according to claim 1, characterized in that: The hydraulic drive assembly (3) is fixed on the outer surface of the box cover (22) near the center of the driving gear shaft (11), and the actuator (27) is fixed on the outer surface of the box cover (22) near the center of the driven gear (12).

4. The hydraulically assisted drive axle according to claim 1, characterized in that: One end of the guide pin (26) is interference-fitted into the mounting holes of the cover plate (24) and the base (25), and the other end is disposed in the guide hole of the box cover (22).

5. The hydraulically assisted drive axle according to claim 1, characterized in that: It also includes an axle housing assembly (1); the passive bevel gear (14) is arranged in the axle housing assembly (1), and the passive bevel gear (14) is connected to the wheel side of the axle via a half shaft.

6. The hydraulically assisted drive axle according to claim 5, characterized in that: The axle housing assembly (1) is any one of a steering drive axle housing, a drive rear axle housing, and a drive middle axle housing.

7. A vehicle, characterized in that: The hydraulically assisted drive axle comprises the hydraulically assisted drive axle according to any one of claims 1 to 6.

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